Veritas Storage Foundation Intelligent Storage Provisioning 5.0.1 Solutions Guide, HP-UX 11i v3, First Edition, November 2009

Figure 4-1
Example implementation of off-host processing
Disks containing primary
volumes used to hold
production databases or
file systems
Disks containing snapshot
volumes used to implement
off-host processing solutions
SCSI or Fibre
Channel
connectivity
OHP host
Primary host
By accessing snapshot volumes from a lightly-loaded host (shown here as the OHP
host), CPU- and I/O-intensive operations for online backup and decision support
do not degrade the performance of the primary host that is performing the main
production activity (such as running a database).
Also, if you place the snapshot volumes on disks that are attached to different
host controllers than the disks in the primary volumes, it is possible to avoid
contending with the primary host for I/O resources.
33Off-host processing solutions
Implementing off-host processing solutions